收稿日期: 2014-03-17
修回日期: 2014-06-23
网络出版日期: 2015-02-10
基金资助
国家科技重大专项(油气专项)资助项目(编号:1211302108020);中央高校基本业务费专项基金(编号:2012047)联合资助.
The Optimum Selecting of Shale Gas Well Location and Gas Content of Lower Cambrian,Northwest Hunan:A Case Study of Well Changye
Received date: 2014-03-17
Revised date: 2014-06-23
Online published: 2015-02-10
根据野外地质调查,结合区域构造特点和沉积背景研究,优选并实施钻探了湖南第一口牛蹄塘组页岩气调查井—常页1井,并通过取样测试分析、现场解析实验对牛蹄塘组含气性进行了定量分析。研究表明,常德市周边及以北的慈利—石门—澧县一带,沉积厚度大、分布稳定、地势平坦,是优选页岩气地质调查井位的有利区域。优选的常页1井揭示了牛蹄塘组富有机质页岩厚674.5m(真厚度),是目前已知我国单井钻遇黑色页岩层系的最大厚度,其有机碳含量、现场解析含气量、等温吸附含气量具有明显的正相关关系,且随着深度的增加,三者都表现为先从顶部到中下部增大、再向底部减小的特点。位于牛蹄塘组中下部、井深为1 067~1 250m的黑色页岩、炭质页岩段,平均有机碳含量为10.14%,等温吸附气量为3.7~5.8 m3/t,现场解析总含气量为0.5~2.1m3/t,是该井页岩气发育的最有利层段,具有良好的勘探潜力。
林拓,张金川,包书景,杨升宇,李博,何伟 . 湘西北下寒武统牛蹄塘组页岩气井位优选及含气性特征——以常页1井为例[J]. 天然气地球科学, 2015 , 26(2) : 312 -319 . DOI: 10.11764/j.issn.1672-1926.2015.02.0312
Key words: Shale gas; Well Changye 1; Northwest Hunan; Niutitang Formation; Gas properties
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